2056 seized Options

[Superhawk996]

what happens when you over-torque that oil screen?

I assume you taking about something really odd as a one off like this

http://914world.com/bbs2/index.php?showtopic=322065
Post #10.

Where bottom of strainer wasn’t in right spot and blocked oil pickup?

But that doesn’t happen from over tightening. That was a damaged or defective oil screen that is too close to the pickup. Likewise it would still result in low oil pressure light and I can’t imagine it lasting 800 miles before it would seize.

Otherwise the threaded stud breaks and is a nightmare to fix requiring case disassembly, or the strainer nut would strip. Either of these should be obvious oil leaks.

[tpines]

So I went back over all my records:

Original 2.0 motor rebuilt with Keith Black 96mm p/c 8:1 compression.
Kept stock cam and fuel injection
Hydraulic lifters installed
Rebuilt 4/23
500 mile break in oil change 6/23
6/ 24 3,000 mile oil change did not need to add oil during this time
7/25 3,000 mile oil change
11/2 Driving to work motor dies after adding 900 miles since oil change.
No sign of oil all over the engine or anywhere else.

I used VR1 the entire time.

[mepstein]

You said you apparently ran low on oil. How low? How much oil left in the engine? Something is way off.
“Performance engines burn a lot of oil” really? Granted, we are building high performance 911 engines, not type 4’s but burning a lot of oil isn’t our experience.

[tpines]

There was probably half a quart to a quart left in the engine when we checked for any metal shavings. Which there were not thankfully.

[mepstein]

There was probably half a quart to a quart left in the engine when we checked for any metal shavings. Which there were not thankfully.

That’s a lot of oil loss in (if I read correctly) 800 miles.

[sixnotfour]

somebody forgot to Add oil...

[GregAmy]

That’s a lot of oil loss in (if I read correctly) 800 miles.

That would make either one helluva mess on the floor, or one helluva smoke screen behind. Not something that could escape someone's notice.

somebody forgot to Add oil...

<Taps side of nose...>

[davep]

I am very sorry to hear of your engine failure, and it certainly does seem to be a mystery.
Was there much oil in the intake tract that might result from too much oil vapor in the engine venting?
Were the spark plugs oil fouled, or the piston crowns with a lot of carbon? Can you tell if it was burning the oil?
Were the piston ring gaps staggered or were they lined up? Were the gaps excessive? Were the rings properly installed?
The bolt for the pulley on the side of the engine case (for the warm up flaps) goes into a through hole, so if missing you would have an open hole in the case. A friend forgot this and drove a thousand miles or so adding oil every few hours, but obviously leaving a smoke screen. The oil dripped on the exhaust so creating the smoke.
Essentially, you should have an obvious leak or smoking a lot to lose that much oil in such a short distance.

[Ninja]

Kept stock cam and fuel injection
Hydraulic lifters installed

(IMG:style_emoticons/default/WTF.gif)

This doesn't account for the missing oil...

[emerygt350]

I wonder if you filled it with penetrating oil, drained it, refilled it with some cheap 30 weight and gave it a little tickle if you couldn't get it spinning again...

[Geezer914]

Who did the oil change?

[mepstein]

That’s a lot of oil loss in (if I read correctly) 800 miles.

That would make either one helluva mess on the floor, or one helluva smoke screen behind. Not something that could escape someone's notice.

somebody forgot to Add oil...

<Taps side of nose...>

It happens...
I won't put hood pins on my cars because I've seen too many people forget to replace them after opening the hood. I know I would forget at least once.

[Jack Standz]

There was probably half a quart to a quart left in the engine when we checked for any metal shavings. Which there were not thankfully.

That’s a lot of oil loss in (if I read correctly) 800 miles.

Please don't take this as "piling on", just trying to understand the cause from the limited information we have read here.

The statement that there was only 1/2 to 1 quart left in the motor and the oil pressure light never came on cannot be reconciled unless the oil pressure light was not working properly. Strongly urge that a mechanical oil pressure gauge is installed for startup of the rebuilt motor and use a working cockpit gauge.

In addition, since the builder of your motor installed hydraulic lifters (with a used FI cam) in a 914 motor, this indicates yet another reason you should question their competency.

[Artfrombama]

Since it was a new motor I didn't think I needed to check the oil
I think this explains the damage. Very sorry this happened, glad the damage was minimal.